dht 11/22

 

https://arduinogetstarted.com/tutorials/

servo and led

 // C++ code

//

#include <Servo.h>

int angle = 0;

int i = 0;

Servo servo_9;

void setup()

{

  pinMode(5, OUTPUT);

  servo_9.attach(9, 500, 2500);

  pinMode(4, OUTPUT);

  angle = 0;

}

void loop()

{

  while (angle < 180) {

    angle += 1;

    digitalWrite(5, HIGH);

    servo_9.write(angle);

  }

  delay(2000); // Wait for 2000 millisecond(s)

  if (angle == 180) {

    digitalWrite(5, LOW);

  }

  while (angle > 0) {

    angle += -1;

    digitalWrite(4, HIGH);

    servo_9.write(angle);

  }

  delay(2000); // Wait for 2000 millisecond(s)

  digitalWrite(4, LOW);

}

ldr and lcd

// C++ code

//

#include <LiquidCrystal_I2C.h>

int ldr_light = 0;

int darkness = 0;

LiquidCrystal_I2C lcd_2(0x27, 16, 2);

void setup()

{

  lcd_2.init();

  lcd_2.clear();        

  lcd_2.backlight();

  pinMode(A0, INPUT);

  pinMode(7, OUTPUT);

  darkness = 650;

}

void loop()

{

  ldr_light = analogRead(A0);

  lcd_2.setCursor(1,0);

  lcd_2.print("Is it dark ?");

  lcd_2.setCursor(1,1);

  lcd_2.print("darkness=");

  lcd_2.print(ldr_light);

  if (ldr_light < darkness) {

    digitalWrite(7, HIGH);

  } else {

    digitalWrite(7, LOW);

  }

  delay(1000); // Wait for 1000 millisecond(s)

  lcd_2.clear();

}

https://www.build-electronic-circuits.com/arduino-light-sensor/
 

7os ΔΙΑΓΩΝΙΣΜΟΣ ΑΝΟΙΧΤΩΝ ΤΕΧΝΟΛΟΓΙΩΝ ΕΕΛΛΑΚ

 smart dustbin

solar tracker

LCD οθόνη και arduino

LCD οθόνη

// C++ code

//

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd_2(39, 16, 2);

void setup()

{

  lcd_2.init();

  lcd_2.clear();

}

void loop()

{

  lcd_2.setCursor(0, 0);

  lcd_2.print("hello world");

  delay(1000); // Wait for 1000 millisecond(s)

  lcd_2.setCursor(0, 1);

  lcd_2.print("Are you Ok ?");

}

χρήσιμες εντολές για την οθόνη:

include <LiquidCrystal.h>  καλούμε τη βιβλιοθήκη για την οθόνη που θα πρέπει να έχουμε κατεβάσει-εγκαταστήσει

 lcd.scrollDisplayRight(); 

 lcd.scrollDisplayLeft();

Με τις εντολές αυτές μπορούμε να έχουμε κινούμενο κείμενο προς την κατεύθυνση της εντολής

watering plants and screen

 υγρασία εδάφους

κώδικας για ρύθμιση 

/* Change these values based on your calibration values */
#define soilWet 500   // Define max value we consider soil 'wet'
#define soilDry 750   // Define min value we consider soil 'dry'

// Sensor pins
#define sensorPower 7
#define sensorPin A0

void setup() {
	pinMode(sensorPower, OUTPUT);
	
	// Initially keep the sensor OFF
	digitalWrite(sensorPower, LOW);
	
	Serial.begin(9600);
}

void loop() {
	//get the reading from the function below and print it
	int moisture = readSensor();
	Serial.print("Analog Output: ");
	Serial.println(moisture);

	// Determine status of our soil
	if (moisture < soilWet) {
		Serial.println("Status: Soil is too wet");
	} else if (moisture >= soilWet && moisture < soilDry) {
		Serial.println("Status: Soil moisture is perfect");
	} else {
		Serial.println("Status: Soil is too dry - time to water!");
	}

	
	delay(1000);	// Take a reading every second for testing
					// Normally you should take reading perhaps once or twice a day
	Serial.println();
}

//  This function returns the analog soil moisture measurement
int readSensor() {
	digitalWrite(sensorPower, HIGH);	// Turn the sensor ON
	delay(10);							// Allow power to settle
	int val = analogRead(sensorPin);	// Read the analog value form sensor
	digitalWrite(sensorPower, LOW);		// Turn the sensor OFF
	return val;							// Return analog moisture value
}

κώδικας με LCD οθόνη:

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display
/* Change these values based on your calibration values */
#define soilWet 500   // Define max value we consider soil 'wet'
#define soilDry 750   // Define min value we consider soil 'dry'

// Sensor pins
#define sensorPower 7
#define sensorPin A0


void setup() {
  pinMode(sensorPower, OUTPUT);
  lcd.init();                      // initialize the lcd 
    // Print a message to the LCD.
  lcd.backlight();
  // Initially keep the sensor OFF
  digitalWrite(sensorPower, LOW);
  
  Serial.begin(9600);
}
void loop() {
  int moisture = readSensor(); //get the reading from the function below and print it
  Serial.print("Analog Output: ");
  Serial.println(moisture);
  lcd.setCursor(3,0);
  lcd.print(moisture);
  delay(1000);
  
  // Determine status of our soil
  if (moisture < soilWet) {
    Serial.println("Status: Soil is too wet");
    lcd.setCursor(1,0);
    lcd.print("Soil is too wet");
    
  } else if (moisture >= soilWet && moisture < soilDry) {
      Serial.println("Status: Soil moisture is perfect");
      lcd.setCursor(1,0);
      lcd.print("Soil moisture is perfect");
      
  } else {
    Serial.println("Status: Soil is too dry - time to water!");
    lcd.setCursor(1,0);
    lcd.print("Soil is too dry");
    lcd.setCursor(1,1);
    lcd.print("time to water!");
    
  }
    
  delay(1000);  // Take a reading every second for testing
          // Normally you should take reading perhaps once or twice a day
  Serial.println();
  lcd.clear();
}

//  This function returns the analog soil moisture measurement
int readSensor() {
  digitalWrite(sensorPower, HIGH);  // Turn the sensor ON
  delay(10);              // Allow power to settle
  int val = analogRead(sensorPin);  // Read the analog value form sensor
  digitalWrite(sensorPower, LOW);   // Turn the sensor OFF
  return val;             // Return analog moisture value
}

https://photos.app.goo.gl/NYa84PFEHRsjsNu46

Creators-coding club

 https://roboticsbackend.com/arduino-push-button-tutorial/

https://www.tinkercad.com/joinclass/JD52BWHBY